COUNTY WATER-SYSTEM LEDGER

Columbia, Oregon

Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.

Systems3active CWS · pop. 2,500+

Population served24,620reported total; may overlap

Current violation flag0.0%0 systems

Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Columbia

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

Water system	Population served	Primary source	Current export status
St Helens, City OfOR4100724	13,410	Groundwater under influence of surface water	No current violation flagged
Scappoose, City OfOR4100792	8,710	Surface water	No current violation flagged
Mcnulty Water PudOR4100725	2,500	Ground water	No current violation flagged

02 / SOURCE MIX

Groundwater under influence of surface water1 systems · 13,410 served

Surface water1 systems · 8,710 served

Ground water1 systems · 2,500 served

How to read the population total

It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.